Aprilaire 4792 Maintenance Kit with Water Panel 10

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Aprilaire Humidifier Maintenance Kit 4792 includes everything you need to keep your Aprilaire Humidifier 500, 500A and 500M operating like new. Ensure peak performance for years to come. What's Included: 10 Water Panel 4640 Scale Control Insert 4223 Drain Spud 4231 Yellow Orifice 4335 Water Feed Tube 4331 Distribution Tray 4004 In-Line Strainer User Manual